Doubler



Oct. 9, 1923.

H. G. MCILVRIED DOUBLER Filed April 25, 1922 5 Sheets-Sheet 2 5 Sheets-Sheet 3 men for: flan 4E0 M v,

Oct. 9 1923.

H. MCILVRIED DOUBLER Filed April 25 1922 Wnesss:

Oct. 9, 1923. 1,493

- H. G. M ILVRIED DOUBLER Filed April 25.. 1.922 5 Sheets-Shet 4 Mamas Patented Oct. 9, 1923 HOWARD G. McILVRIED, OF PITTSBURGH,v PENNSYLVANIA, ASSIGNOR TO AMERICAN SHEET AND TIN PLATE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORA- TION OF NEW JERSEY.

DOUBLER.

Application filed April 25, 1922. Serial No. 556,440.

To all whom it may concern:

Be it known that I, HOWARD G. MoILvRrED,

a Citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Doublers, of which the following is a specification.

This invention relates to doubling machines for sheets and plates and more particularly to machines for doubling packs of sheets or plates during the rolling thereof, and has for one of its objects the provision of a novel doubling table having means for adhesively engaging and holding the sheets or plates during the doubling operation.

Another object is to provide automatic controlling'means for controlling the means for adhesively enga ing the sheets and 2 plates, whereby the p ates are released at a predetermined point in the doublingoperation.

Another object is to provide a doubling machine that may be mounted below the floor level of the mill.

A further object is to provide a doubler having the novel features and provided with a matching mechanism whereby the packs of sheets or plates to be doubled may be matched prior to doubling.

A still further object is to provide a doubler having the novel design, construction and combination of parts illustrated in the accompanying drawings and described in the following specification.

In the drawings, Figure -1 is a side elevation of a machine embodying this invention.

Figure 2 is a vertical sectional elevation on the line'IIII of Figure 1. Fig. 2 is a view similar to Fig. 2 showing the doubling table partly closed.

Figure 3 is a top plan of the machine.

Figure 4 is a wiring diagram illustrating the n'lanner in which the machine may be controlled.

Referring more particularly to the drawings, the numeral 2 designates the base of the machine which supports a frame 3, motor 27, worm and worm wheel casing 5, and limit switch 6.

The whole machine is mounted in a suitable pit 7 below the floor so as not to interfere with the usual mill operations above the floor level.

The doubling table is composed of two leaves 8 and 9, each of which is pivotally mounted on a swinging supporting arm 10 at each end, which arms are secured togeth er bya cross tie 11 and are pivotally mounted ombrackets 12 of the main frame 2.

The leaves 8 and 9 are recessed adjacent their center to provide space for the operating links 13, which are pivotally secured at their upper ends to pins 14 mounted in the leaves and have their lower ends pivotally secured to levers 15 which are pivotally secured at their lower ends to fixed brackets 16. The levers 15 have their lower ends pivoted on the same axis as the lower end of the levers or arms 10 so as to cause an even swinging movement of the leaves 8 and 9.

The links13 are pivotally connected intermediate their ends to short arms 17 on a cross head 18. Connecting rods 19 and 20 are pivotally connected at their upper ends to the cross head 18 and at their lower ends to crank'a'rms 21 and 22 mounted on a worm wheel shaft 23 journaled in worm wheel casing 5, and having a worm wheel 24 thereon 1n mesh with a worm 25 on worm shaft 26. The shaft 26 is coupled direct to the armature shaft of the motor 27 which furnishes. driving power for the machine.

It will be readily seen that each revolution of the worm wheel shaft 23 and crank arms 21, 22 will reciprocate the connecting rods 19 and 20 and cross head 18 so as to cause the leaves 8 and 9 of the doubling table to fold toward each other and return to normal or horizontal position again.

Each of the leaves 8 and 9 is provided with a plurality of live magnet cores 29 adapted to be energized and toadhesively engage or hold the plates or sheets against the table during the folding operation. The operation of the motor 27 and the energizing and tie-energizing f the magnet cores are automatically controlled by the limit switch 6- which is geared to the worm wheel shaft 23 by gears 30 and 31. The operation of the magnet cores, and limit switch will be more fully brought out in the detailed description of the. wiring diagram of Figure 4. v

-' connected Matching mechanism comprising straight edge 33, side fingers 34 and 35 adapted to move the plates against the straight edge 33 and end fingers or stops 36 and 37, is provided for matching the plates.

The side fingers 34 and 35 are mounted on bases 38 and 39 respectively, each of which is provided with a pair of downwardly extending lugs 40 and 41. Pairs of levers 42 and 43 are secured to the lugs 41 and 40, respectively, and the levers 42 are pivoted intermediate their ends to brackets 44 on the frame 3. VVhil'e the levers 43 are pivoted at their lower end to the brackets 44, the operation of these levers is such that the fingers 34 and 35 are held in a vertical position and when reciprocated are compelled to move toward and away from the plates.

The levers 42 have their lower ends connected by links 45 to crank arms 46 on a shaft 47, and the shaft 47 is provided with a second crank arm 48 connected by link 49 to a rocking lever 50 adapted to be rocked by a fluid cylinder 51 having its piston rod 52 pivotally connected to the lever 50 adja cent its one end.

The end of the rocking lever 50 nearest the piston rod 52 is connected by a link 54 to a crank arm 55 secured to a shaft 56 journaled in brackets 57 on the frame 3. An operating lever 58 is pivotedintermediate its ends on the shaft 56 and has its upper end pivotally secured to the end stop or finger 36. The lower end of the-lever 58 is by an adjustable connecting rod 59 to a second operating lever 60 which is pivotally mounted on a bracket 61 and has its upper end pivotally secured to the end matching finger 37. The connecting rod 59 is connected to the lever 58 at a point below the shaft 56 and connected to the lever 60 at a point above the bracket 61 so both levers are compelled to move inwardly and outwardly together. A coil spring 62 has its one end connected to the lower end of the lever 60 and its other end connected by an adjustable connection 63 to the lower end of the lever 58 so as to normally hold the levers 58 and 60 and the matching fingers 36 and 37 inretracted position. The operation of the matching mechanism is as follows: When fluid is admitted to the cvlinder 51 the piston rod 52 oi" the cylinder will move down forcing the rocking lever 50 to move downwardly, thus rocking the shaft 47 through link 49 and crank arm 48 and the movement of the shaft 47 will be transmitted through crank aims 46 and links 45 to the operating levers 42. thus reciprocating or moving the matching fingers 34 and 35 inwardly to match the plates against the straight edge 33.

Due to the greater amount of leverage from the point of connection of the piston rod 52 with the rocking lever 50 to the lever operating shaft 47, and the greater amount of leverage in the cranks 48 and 46 than in crank 55, the lever 50 will pivot around the connection with the link 54 with the first part of the downward movement of the piston rod 52, thus operating the shaft 47 and matching fingers 34 and. 35. Continued downward movement of the piston rod 52 will, however, move the end of the rocking lever 50 nearest the piston rod down, thus rocking the crank arm 55 and shaft 56 and thus cause the matching fingers 36 and 37 to move inwardly against the ends of the plates. The spring 62 serves to return all parts of the matching mechanism to their retracted or normal position as soon as the fluid pressure is removed from the cylinder 51.

The end matching fingers 36 and 37 which are-pivotally mounted on the upper ends of the levers 58 and 60, respectively, have their rear ends projecting beyond the levers and a coil spring 65 is connected to the extended portion and to the levers, thus tending to normally rock the matching fingers upwardly around thei pivotal connection. A lug 66 is formed on the extended portion of the fingers 36 and 37 and forms a stop to limit the upward movement thereof. Suitable stops 67 are provided below the floor level and in the path of travel of the fingers 36 and 37, which are adapted to engage the fingers during the retracting movement of the levers 58 and 60 and force'the fingers downward against the tension of the springs 65 until they assume a position below the floor level so that they will not interfere with the positioning of plates on the table. In Figure 4. a characteristic wiring dia-. ram is shown including the automatic control of the doubler. In this figure the numerals 70 and 71 designate the main positive and negative supply lines. respectively, which lead to main switches 72 and 73 controlling two independent circuits for the motor 27 and the magnets 29. respectively.

Closing the switch 72 will complete an operating circuit through wire 74. series field 75, and wire 76. as far as contactor 77. The closing of switch 72 also makes a shunt circuit through wire 78. through motor shunt field 79, wire 80, coil 81 of contactor 82, wire 83 to the other side of line. thus energizing the shunt field 79 and closing 1 contactor 82.

A shunt control circuit is led from the main lines 70 and 71 through wires 70" and 71 to a switch 84. By closing switch 84 a control circuit is made through wire 85. coil 86 of contactor 77. wire 87. to master control switch 88, through wire 9 to contactor 90 of automatic limit switch 6. through wire 91. switch 88, wire 92. contactor 82. wire 93 to other side of line. The energizing of coil 86 will cause the cont-actor 77 to close. thus the armature 99 of motor 27 to wire 100 to.

the pole 97 of the switch 95, to wire 101 and to opposite side of line. I

The completion of the ilbOWE circuits will operate the motor 27 and it will be readily seen that unless one of the switches 72, 84, 88, or 96 is pulled to break the circuit, the motor will continue to operate until the automatic limit switch 6 breaks the contactor 90.

lVhen the main line switch 73 is closed, the wires 102 and 103 are energized as far as the contactors 104 to 111 inclusive. A shunt control circuit is led from the main line wires 70. 71 to a control switch 112 through wires 113 and 114. Closing the switch 112 will energize wire 115'to the multiple double-throw master control switch 116 and wire 117 leading to the coils of the contactors 104 to 111 inclusive. Closing of the master control switch so as to engage the contacts'118 to 123 inclusive, will complete the energization through wires 124 to 129 inclusive, .to the automatic limit switch 6 which will be assumed to be in starting position. that is. in the position shown in the drawing, with its contactor 130 bridging wires 124 and 125. Vith the switch 6 in this position, a control circuit will now be completed from wire 117 through the coils of contactors 104, 105. 110 and 111, wire 131,

switch 116, contact 118; wire 124, contactor 130 of limit switch 6. wire 125, contact 119, wire115 to other side of line at switch 112, The completion of this circuit will close the contactors 104, 105, 110 and 111.

Closing of contactors 104, 105, 110. and 111 completes'the' magnet energizing circuits from wire 102 through the contactors 104, 105, wires 132, 133, to collector rails 134, 135, and collectors 136, 137, respectively, to the magnets 29 in the leaves 8 and 9 of the doubling table. thence through collectors 138, 139 and collector rails 140 and .141. re spectively, to wires 142 and 143. through contactors 110, 111 to wire 103 and other. side of line, thus energizing the magnets 29 so as to grip the plates. j

When the motor 27 is operated to manipu. late the leaves 8 and-9 of the table it also operates the limit switch 6 sothatposition of the contacts of such switch are constantly changing position, and just prior to the completion of the doubling operation contactor 130 will break and a second contactor 144 will make or bridge across the wires 126 and 127. This operation will break the energizing circuit to the magnets above described by breaking the control cir-, cuit to the contactors 104, 105, 110 and 111, allowing these contactors to open. However, when the contactor 144 of the limit switch bridges wires 126 and 127 a new control circuit will be made from the wire 117 through the coil of contactor 106 to wire 145 andthrough a second manipulator 146 of contactor 111 to wire 145 to wire 145, through switch 116, wire 126, limit switch contactor 144 to wire 127, returning through switch 116 to wire 115 tothe other side of line and closing contactors I06 and 111. The closing of contactors 106 and 111 will complete a limited energizing circuit to flow through the magnets of leaf 8 of the doubling table as follows-from wire 102 through contactor 106 to wire 147, through a resistor 148, wire 149 to wire 133, thence through collector rail 135, collector 137, magnets 29 of leaf 8, collector 139, collector rail 141, wire 143, contactor 111, and wire 103 to other side of line. This circuit serves slightly to energize the magnets of the leaf8 and causes the doubled pack of plates to adhere to this leaf during the lowering or return movement of the doubling table and, therefore, causes the plates to be delivered to the proper side of the apparatus.

Since the limit switch 6 is being continuallyoperated by the 'motor 27, the contactor 144 will be broken, thus causing the last named energizing circuit to the magnets 29 of the plate 8 to be broken by the.

opening of contactors 106 and 111. However, still another contactor 150 on the limit switch 6 operates before the leaves 8 and 9 have returned to their normal or lower position. After the contactor 144 breaks, the contactor 150 makes or bridges across the wires 128 and 129, thereby completing a control circuit from Wire 117 through the coils of contactors 107, 108, and 109, wire 151, switch 116, wire 128, contactor 150, wire'129, switch 116, and wire 115 to the other side of line. This control circuit causes the contactors 107 108, and 109 to close and complete a reverse circuit through the magnets as tollowsfrom wire 102, through contactor 107. wire 152. resistor 153, wires 154. 155. to wires 142 and 143, respectivelv, thence through collector rails'140 and 141, collectors 138 and 139, through the magnets 29, then through collectors 136 and 137, collector rails 134 and 1.35 to wires132 and 133, to wires 156 and 157, then through contactors 109 and 108 to wire 103 and other side of line. This reverse circuit through the magnets is of very short duration. and serves to set up a repelling force to loosen the plates from the magnets as the table returns. x

Just prior to the return .of the table to its normal position, the contactor 150 will break.

and then as the table finishes its lowering movement, the contactors 130 and 90 of the limit switch will break and make with the other set of contacts on the opposite side of the switch ready for the next doubling operation, and the motor 27 will come to rest.

The switches 88 and 116 are double-throw switches, and their opposite sides are connected to the opposite sets of contacts of the limit switch 6, so that it is only'necessary to re-set these switches when it is desired to again double a pack of plates.

The double-throw double-pole reversing switch 95 is used to reverse the motor only in emergencies, and, therefore, is normally set to contact with the poles 96 and 97. However, if,.for any reason, it is desired to reverse the motor, it may be thrown to the reverse side so as to contact with the poles 96 and 97* and thereby cause amotor operating circuit to flow from the wire 94 through switch 95, wire 100, motor armature 99, wire 98, switch 95, wire 101 to other side of line.

The operation of the doubler is as follows- Assumingthat all the switches are closed with the exception of the master control switches 88 and 116, and that the limit switch is in the position shown in the drawings, the master control switch 116 will be closed by the operator to engage the contacts 118 to 123 inclusive, thus causing the magnets to be energized as described above to grip the plates, that is, adhesively or magnetically hold them on the table. The switch 88 will then be closed to bridge the wires 89 and 91, thus causing the motor circuit to be made as described above, and the motor to operate. As the motor operates to raise and lower the leaves 8 and 9 of the table, it will also operate the limit switch 6 to cause the contactors 130, 144, 150, and 90 to make and break in order that the main energizing circuit to the magnets will be broken, the limited energizing circuit to the magnets of table leaf 8 will be made and broken, the reverse circuit through magnets will be made, and the motor circuit will be broken last to stop the motor during one cycle of operation. To double the next pack of plates, the operator will throw the switches 88 and 116 in the reverse direction, since the limit switch has a double 'set of contacts and has re-set the contactors 90 and 130 before the motor has come to rest.

While a detailed description of the wiring diagram and control has been given, it will be understood that it is not desired to limit this invention to such a control, since various controls may he designed to operate in the same or substantially the same manner without departing from the scope of this invention as defined in the appended claims.

I claim 2- 1, A doubling machine for metal plates masses and sheets, comprising a base, a frame supporting structure, a doubling table composed of two leaves, arms pivotally secured to said frame and to said table leaves for supporting said leaves, links pivotally secured to said leaves intermediate their ends adjacent their inner side faces, said links having their other ends pivotally secured to the upper end of levers which have their lower ends pivotally secured to said frame, a cross head having upwardly and outwardly extending arms, said arms-being pivotally connected intermediate the ends of said links, a connecting rod pivotally connected to said cross head, and means for reciprocating said connecting rod to cause said table leaves to move downwardly and inwardly toward each other.

2. A. doubling machine for metal plates and sheets,l,comprising a base, a frame supporting structure, a doubling table composed of two leaves, magnets in said leaves adapted to 'adhesively hold the metal plates and sheets on said table during the doubling operation, arms pivotally secured to said frame and to said table leaves for supporting said leaves, links pivotally secured to said leaves intermediate their ends adjacent their inner side faces, said links having their other ends pivotally secured to the upper end of levers which have their lower ends pivotally secured to said frame, a cross head having upwardly and outwardly extending arms, said arms being pivotally connected intermediate the ends of said links, a connecting rod pivotally connected to said cross head, and means for reciprocating said connecting rod to cause said table leaves to move downwardly and inwardly toward each other.

3. The combination witlna doubling machine comprising a base, a frame supporting structure, a doubling table composed of two leaves, arms pivotally secured to said frame and to said table, means for supporting said leaves, and means secured to said leaves intermediate their ends adjacent their inner side faces adapted to operate said leaves to fold sheets and plates secured thereto, of a matching mechanism for matching the sheets and plates prior to doubling them, said mechanism comprising a straight edge extending transversely of said table, a pair of side matching fingers adapted to move the sheets and plates against said straight edge, a pair of end matching fingers adapted to match the sheets or plates endwise, and means for operating said side and end matching fingers so as to cause said side fingers to move sheets and plates against said straight edge prior to the engagement of said end matching fingers with the sheets or plates.

4. A doubling machine for and. sheets, comprising a base,

metal plates a frame supporting structure, a doubling table composed of two leaves, arms pivotally secured to said frame and to said table leaves for supporting said leaves, brackets on said frame, levers having their lower ends pivotally secured to said brackets, said lower ends of said levers being pivoted on the same axis as said supporting arms, operating links pivotally secured to the upper ends of said levers and to said leaves, a cross head connected to each of said links, a connecting rod pivotally connected to said cross head, and means'for reciprocating said connecting rod to cause a doubling action of said table leaves.

In testimony whereof I have hereunto signed my name.

HOWARD G. McILVRIED. 

